Corrected Relative Volatility Index. This indicator was originally developed by Donald Dorsey (Stocks & Commodities V.11:6 (253-256): The Relative Volatility Index).
The indicator was revised by Dorsey in 1995 (Stocks & Commodities V.13:09 (388-391): Refining the Relative Volatility Index).
I suggest the refined RVI with optional settings. If you disabled...
The script shows arrows on bars that are in overbought or oversold, based on the set parameters of Relative Strength Index ( RSI ) and Relative Volatility Index (RVI).
Also there is a universal allert, which includes both conditions - overbought and oversold.
You can change the period of RSI and RVI, as well as the upper and lower boundaries of these indicators.